Email Validator

Validate the format of an email address. This tool checks the syntax according to RFC 5322 standards.

Email Address:

Try examples:

valid with tag invalid no @ spaces

About Email Validation

Email addresses follow a specific format defined by RFC 5322. A valid email address consists of a local part, the @ symbol, and a domain part.

Email Structure

local-part@domain.tld

Local Part (before @)

Can contain letters, numbers, and special characters: . _ % + -
Cannot start or end with a dot
Cannot have consecutive dots
Maximum 64 characters

Domain Part (after @)

Must contain at least one dot
Labels separated by dots can contain letters, numbers, and hyphens
Labels cannot start or end with a hyphen
TLD must be at least 2 characters
Maximum 255 characters total

Limitations

This validator checks the syntax/format of an email address. It does NOT verify:

Whether the domain exists
Whether the mailbox exists
Whether the email can receive messages
Whether the email is a disposable/temporary address

Tip: Format validation is just the first step. For critical applications, consider using email verification services that check deliverability.

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